A new paper just out trying to update the nomenclature and authorship of ammonoids:
The higher taxonomic nomenclature of Devonian to Cretaceous ammonoids and Jurassic to Cretaceous ammonites including their authorship and publication
Hoffmann, René; Howarth, Michael K.; Fuchs, Dirk; Klug, Christian; Korn, Dieter
It may be the latest but it won't be the last. I'm sure that just like those back in the fifties they're getting close to something natural. This should last 70 years just like the old scheme, with plenty of differing options in the interim.
